“Let’s make a simple arduino switch. It is very useful way to run your devices for specific time.
Supplies:
1. Arduino Uno
2. Dot matrix PCB
3. OLED 0.96’ Display
4. 5v Relay
5. BC547 Transistor
6. 1N4007 Diode
7. 1Kohm Resistor
8. Push buttons x3
9. Wires
10. Connector”